hi i just join this forum and was wondering if anybody could help me find a repair manual on a website that i can download for free cuz i'm rebuilding this m50 that i have and kindda got stuck with it ... thanks

You'll ahve better luck looking for answers to specific questions. I know of no manuals available online. If you don't mind using p2p software, you can try to get it through kazAa or whatever people are using nowadays. Back in the day that is how I got a lot of software, media, etc.

I recommend you get the Bentley manual for the 3-series. It will only run you about $50 shipped free from amazon: well worth it.